It turns out kids in wealthier homes have higher IQs, not because of genetics but because of environment. Surely you can be frugal (or just plain poor) and raise a smart one? A psychology professor suggests you focus on praising effort over achievement, and teach delayed gratification—something that also helps when it comes to financial responsibility, so it’s a win/win skill. You should also explain that IQ is expandable, not inherent: “Students exposed to that idea work harder and get better grades.”